text: Fatta-Kassinos conducts research on wastewater issues with a scientific focus on the fate and risk of contaminants of emerging concern, such as pharmaceuticals, and development of new advanced treatment methods for their effective removal. Her early work presented the occurrence patterns, source, and fate of pharmaceuticals in water and wastewater, and investigated the effectiveness of numerous advanced oxidation processes (AOPs) technologies for the removal of residual pharmaceuticals in water bodies. Her further research extended the wastewater discipline, and discussed the unique nature, characteristics, transformations, and fate of pharmaceuticals. In particular, she has studied the chemical identification and quantification of pharmaceuticals, discussed the use of AOP processes for their removal, and analyzed the potential biological effects in aquatic matrices. Furthermore, her studies have elucidated the transformation pathways of pharmaceutical residues with regard to their presence both in wastewater-treatment plants and in water matrices. In one of her highly cited review works, she examined  the formation, fate, and effects of transformation of pharmaceutical products during photolytic processes and AOP, and  brought attention to the various factors that contribute to the lack of understanding of the scope of potential problems associated with the presence of residual pharmaceutical compounds.